Federal direct subsidized loans are based on financial need. The federal government pays the interest during in-school, grace and deferment periods. Federal direct unsubsidized loans are not based on financial need, and the federal government does not pay the interest for these loans. Students may choose to defer interest payments until repayment begins; however, the student is responsible for all interest that accrues.
1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
A. A. Smoking and second-hand smoke from cigarettes, cigars, and pipes can contribute to headaches for both the smoker and the non-smoker. Nicotine, one of the components of tobacco, stimulates the blood vessels in the brain to constrict (narrow). Smoking also stimulates the nerves in the back of the throat, contributing to headache pain. Usually, by removing the stimulus (nicotine), headaches will be relieved. Quitting smoking or reducing exposure to second-hand smoke is especially helpful for those with cluster headaches.